Merge pull request #33 from brad-jones/master

Do no cast to array default passed to `a()` to allow usage of closure as default.

src/Extensions/Helpers.php

@@ -265,7 +265,7 @@ public function raw($var, $default = '', $filter = null)
      */
     public function asArray($var, $default = [], $filter = null, $forceRaw = false)
     {
-        $raw = $this->raw($var, (array) $default, $filter);
+        $raw = $this->raw($var, $default, $filter);
 
         return \Foil\arraize($raw, ($this->autoescape && ! $forceRaw));
     }